Relaxation rate of fine magnetic particles
作者： L. Bessais , J.L. Dormann , L. Ben Jaffel
DOI: 10.1016/B978-0-444-89552-3.50008-6
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摘要: Brown treated the problem of thermal agitation single domain particles using theory Brownian motion. He obtained a Fokker-Planck equation, but he did not calculate eigenvalues this equation. A new method for solution partial differential equation is presented. This can be used any angular dependence anisotropy energy. Applied to axially symmetric case we calculated numerical solutions large range α (α = KV/kT, where K energy constant and V volume particle) values derived an analytical formula relaxation rate.
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